I am physically alive on the earth. I can communicate with others here on earth.
No Apostle ever prayed to a departed saint, nor taught it in all Scripture.
It was not believed, nor practiced before 100 ad.
Later, from paganism this practice and many others of Catholicism were added to Christianity.
You need to read the Bible more. Jesus himself teaches us to pray to the saints as he did at the Transfiguration. (Matthew 17:1–8, Mark 9:2–8, Luke 9:28–36)